{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["DNA", "cell line", "protein", "cell type", "RNA"], "input": "In 1991, we demonstrated, using electrophoretic mobility shift assays , that 3 different factors (termed B1 , B2 and B3 ) with affinity for the KB-enhancer target sequence were specifically detected in nuclear extracts from HIV1 -infected monocytes and macrophages ."}
{"DNA": ["KB-enhancer target sequence"], "cell line": [], "protein": ["B1", "B2", "B3"], "cell type": ["HIV1 -infected monocytes", "macrophages"], "RNA": []}